XIII, D. 3 Bergroth: Philippine Heteroptera, I 125 



NOTONECTID^ 



Helotrephes balnearius sp. nov. 



Obovate, above finely and thickly punctulate with fuscous, the 

 punctation of the head and apical part of pronotum extremely 

 fine and thick, almost concolorous on the head. Head consider- 

 ably narrower than humeral width of pronotum, seen from be- 

 fore one-third broader than long, the anteocular part a little 

 shorter than the vertical diameter of the eye, vertex over three 

 times broader than an eye, the distance between upper end of 

 eyes and top of head seen in profile much shorter than that 

 between lower end of eyes and apex of head, the triangular 

 acute subgenal appendices directed downward and somewhat 

 backward. Pronotum conspicuously narrowed from the humeral 

 to the apical angles, the lateral margins seen from above straight, 

 seen from the side profoundly arcuately sinuate, the sinuosity 

 reaching upward above the middle of the eye, the uppermost 

 point of the sinuosity being midway between the crown of the 

 pronotum and the lower margin of the sternum so that the 

 sternum is completely visible in the sinuosity, the lateral margins 

 of the pronotum and head forming together a continuous narrow 

 ledge. Scutellum at the base slightly broader than the vertex, 

 the apex subacute. Elytra without a claval suture, passing and 

 deflected over the apex of the abdomen, their exterior base lying 

 considerably above the inferior surface of the body, the lateral 

 margins rather strongly descending from the base to the apex. 

 Abdomen somewhat acclivous toward its posterior end. Color 

 above pale testaceous with the following fuscous markings: A 

 basal fascia to head emitting two narrowly separated vittse to 

 middle of head, a broad, posteriorly deeply sinuate apical fascia 

 to pronotum behind and confluent with the basal fascia of the 

 head, a narrow basal fascia to scutellum, and numerous irrora- 

 tions on basal two-thirds of pronotum (excluding the unspotted 

 basal margin), on scutellum, and on elytra; underside of body 

 piceous; rostrum pitchy testaceous; legs testaceous, tarsi tinged 

 with piceous. 



Length, 2.5 millimeters. 



Luzon, Laguna, Los Banos. 



A species remarkable by the deep lateral sinuosity of the body 

 (as seen in profile) . Very distinct from the type of the genus 

 and differing still more from H. indicus Dist., but possibly more 

 allied to H. martini Kirk., as far as can be judged from Kirkaldy's 

 utterly inadequate descriptions of the species of this genus. 



In this genus the head is not independently moveable, being 



